Patent CA988620A successfully refreshed from Google Patents.
Patent US3864254A successfully refreshed from Google Patents.
US3864254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment unit
Assignee: Texaco Inc
•
Filing: 1973-03-28
•
Granted: 1975-02-04
•
Expires: 1993-03-28
Abstract
Abstract A sewage treatment unit for the disposal of aqueous waste sewage from a small installation such as a service station includes a primary settling zone receiving the sewage and separating raw sludge from the water. A first pump conveys the water to a storage zone and actuates a second pump which meters in hydrogen peroxide from a supply thereof into the storage zone to reduce the COD of the water. A pump forces the settled sludge to a coking zone where it is coked in the liquid phase. The coke thus formed then passes to a pressure settling device where it is separated from the coking effluent which is recycled to the storage zone.
Inventors
- 👤 Howard V Hess
- 👤 William F Franz
- 👤 Edward L Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:02
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/10; C02F1/00; C02F1/72; C02F1/722; C02F2103/00; C02F2103/005; Y; Y02; Y02W; Y02W10/00; Y02W10/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A PROCESS FOR TREATING AQUEOUS WASTE SEAWAGE COMPRISING CONVEYING SAID SEAWAGE TO A PRIMARY SETTLING ZONE; SEPARATING LIQUID FROM SOLIDS WASTES; FLOWING SAID LIQUID TO A WATER STORAGE AND TREATING ZONE AND SYNCHRONOUSLY SUPPLYING HYDROGEN PEROXIDE TO SAID LIQUID, COKING SAID SOLID WASTE UNDER A PRESSURE OF ABOUT 500 TO 3000 PSIG AT A TEMPERATURE BETWEEN ABOUT 550*F AND 750*F TO FORM COKE AND A LIQUID EFFLUENT; SEPARATING SAID COKE FROM SAID EFFLUENT; RECYCLING SAID EFFLUENT TO SAID WATER STORAGE AND TREATING ZONE AND PERIODICALLY TREATING SAID EFFLUENT WITH HYDROGEN PEROXIDE AS SAID EFFLUENT PASSES TO SAID ZONE.
Claim 2
Dependent Claim
98 words
A PROCESS FOR TREATING AQUEOUS WASTE SEAWAGE COMPRISING CONVEYING SAID SEAWAGE TO A PRIMARY SETTLING ZONE; SEPARATING LIQUID FROM SOLIDS WASTES; FLOWING SAID LIQUID TO A WATER STORAGE AND TREATING ZONE AND SYNCHRONOUSLY SUPPLYING HYDROGEN PEROXIDE TO SAID LIQUID, COKING SAID SOLID WASTE UNDER A PRESSURE OF ABOUT 500 TO 3000 PSIG AT A TEMPERATURE BETWEEN ABOUT 550*F AND 750*F TO FORM COKE AND A LIQUID EFFLUENT; SEPARATING SAID COKE FROM SAID EFFLUENT; RECYCLING SAID EFFLUENT TO SAID WATER STORAGE AND TREATING ZONE AND PERIODICALLY TREATING SAID EFFLUENT WITH HYDROGEN PEROXIDE AS SAID EFFLUENT PASSES TO SAID ZONE.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said hydrogen peroxide is in solution form at a concentration of 50 to 70 per cent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |